How many women who are willing to have sex on camera can resist the big money that is available to them for an hour or two of work? If you make a name for yourself in porn, there are guys will pay $1-3K per hour for your services. And let's face it - many girls who do porn were "escorting" before they ever hit the valley. No one bitches at them for using that fame to make feature bucks stripping, so why should they get bitched at for relieving a fanboy of his money with a little private fuckee-suckee. I say more power to them.
That said, Katja Kassin is still a euro-skank.